I loved this book. I think its going on my list of all time favorites. The first half of the book is better than the second, but I think that might be because young Nell resonated much more strongly with me than older Nell. I read this book because it came up at a scientific conference where I went to a presentation about 3D fabrication, and its now entirely clear why the presenter thought this was relevant, given 3D nanotech fabrication plays a strong part in this book. Excellent read.